# US 9,435,880 B2 · Pulse transponder countermeasure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,880 B2 - Document ID: US9435880B2 - Status: Granted - Kind: B2 - Application number: 14/352,097 - Filed: 2012-11-13 - Published: 2014-08-28 - Granted: 2016-09-06 - Earliest claimed: 2011-11-18 - Applicants: Ron Yaacov Davidson - Inventors: Ron Yaacov Davidson - Web page: https://patentgrep.com/patent/US9435880B2 ## CPC - G01S 7/495: Counter-measures or counter-counter-measures {using electronic or electro-optical means} - G01S 7/4806: {Road traffic laser detectors} - G01S 17/58: Velocity or trajectory determination systems; Sense-of-movement determination systems - G01S 17/88: Lidar systems specially adapted for specific applications - H04K 3/00: Jamming of communication; Counter-measures - H04K 3/60: {Jamming involving special techniques} - H04K 3/80: {Jamming or countermeasure characterized by its function} - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H04K: SECRET COMMUNICATION; JAMMING OF COMMUNICATION ## Abstract A pulse transponder countermeasure device, comprising: a central processing unit (CPU); an optical receiver adapted to receive detection signals from a speed measuring device; at least one optical transmitter adapted to transmit jamming signals to the speed measuring device; at least one software controlled driver configured to drive the optical transmitter and memory storing a database of measuring devices signature signals and reflective signals, the CPU configured to identify the speed measuring device in its database according to the received detection signal's signature and calculate a response time for sending a jamming signal to the speed measuring device so as to change the speed perceived by the speed measurement device. ## Claims ### Claim 1 A pulse transponder countermeasure device, comprising: a central processing unit (CPU); an optical receiver connected with said CPU, said optical receiver adapted to receive detection signals from a speed measuring device; at least one optical transmitter connected with said CPU, said at least one optical transmitter adapted to transmit jamming signals to said speed measuring device; and a speed sensor unit adapted to measure a vehicle's speed, said CPU configured to use said vehicle's speed to calculate a response time for sending a jamming signal to said speed measuring device. ### Claim 2 (depends on 1) The device of claim 1, said CPU further configured to quantify at least one of said detected signal's dimensions and send a jamming signal that simulates a reflected signal. ### Claim 3 (depends on 2) The device of claim 2, wherein said transmitter is configured to control at least one of said jamming signal's amplitude, width and shape. ### Claim 4 (depends on 1) The device of claim 1, further comprising memory connected with said CPU, said memory storing a database of measuring devices signature signals. ### Claim 5 (depends on 4) The device of claim 4, wherein said database additionally stores measuring devices reflective signals. ### Claim 6 (depends on 4) The device of claim 4, wherein said CPU is configured to identify said speed measuring device in said database according to said received detection signal's signature. ### Claim 7 (depends on 1) The device of claim 1, further comprising means for recording said detection signals. ### Claim 8 A method of jamming a speed and/or distance detection signal, comprising: receiving from a speed measurement device a detection signal directed at a vehicle; measuring said vehicle's speed; using said measured speed to calculate a response time for sending a jamming signal to said speed measuring device so as to change the speed and/or distance perceived by said speed measurement device; and sending a signal toward said speed measurement device at said calculated time. ### Claim 9 A method of jamming a speed and/or distance detection signal, comprising: receiving from a speed measurement device a detection signal directed at a vehicle, said detection signal having a signature and a reflected signal pattern; analyzing said signature to identify said speed measurement device in a database comprising speed measurement devices signatures; calculating a jamming signal; measuring said vehicle's speed; using said measured speed to calculate a response time for sending said jamming signal; and transmitting said jamming signal to said speed measurement device at said calculated time. ### Claim 10 (depends on 9) The method of claim 9, wherein said analyzing comprises using a statistical probability algorithm to find a closest match to said signature in said database. ### Claim 11 (depends on 10) The method of claim 10, wherein if the difference between said closest match and said signature is greater than a predefined threshold, a new entry is created in said database for said signature. ### Claim 12 (depends on 9) The method of claim 9, wherein said transmitting a jamming signal comprises controlling at least one of said jamming signal's amplitude, phase and shape using software control. ### Claim 13 (depends on 9) The method of claim 9, wherein said transmitting a jamming signal comprises changing the speed and/or distance perceived by said measurement device. ### Claim 14 (depends on 9) The method of claim 9, wherein said detection signals comprise a predefined sequence of signals transmitted in a cyclic pattern and wherein said database comprises a complete list of signatures for said cyclic pattern. ### Claim 15 (depends on 9) The method of claim 9, wherein said steps of receiving, analyzing, calculating and transmitting are done simultaneously for at least two speed measurement devices. ### Claim 16 (depends on 9) The method of claim 9, wherein said transmitting comprises: transmitting at least one signal having one dimension similar to said reflected signal and slightly different remaining dimensions; and transmitting a jamming signal wherein said one dimension is slightly different from said one dimension in said reflected signal. ### Claim 17 (depends on 16) The method of claim 16, wherein said one dimension is selected from the group consisting of: signal amplitude, signal width, signal PRP and signal shape. ### Claim 18 (depends on 9) The method of claim 9, additionally comprising adding a database entry for said speed measurement device, comprising said received signal's signature, if said signature is not found in said database. ### Claim 19 A pulse transponder measuring device, comprising: a central processing unit (CPU); an optical transmitter connected with said CPU, said optical transmitter adapted to transmit detection signals to a measured vehicle; and an optical receiver connected with said CPU, said optical receiver adapted to receive reflected signals from said measured vehicle; said transmitter configured to control at least one of said transmitted signal's dimensions. ### Claim 20 A pulse transponder measuring device, comprising: a central processing unit (CPU); an optical transmitter connected with said CPU, said optical transmitter adapted to transmit detection signals to a measured vehicle; and an optical receiver connected with said CPU, said optical receiver adapted to receive reflected signals from said measured vehicle; said CPU configured to detect at least one of said reflected signal's pulse repetition period (PRP), amplitude, width and shape. ### Claim 21 A method of measuring a vehicle's speed, comprising: generating at least one first random number; calculating a first detection signal by assigning said at least one first random number to at least one dimension of said calculated first detection signal; transmitting said calculated first detection signal towards a vehicle.